There are multiple definitions:

1. systolic dyssynchrony index(English)

   • SD of time to minimum systolic volume of the 16 LV segments expressed in percent RR duration
   • STV, CRT, RR, MD, GLS, GPI, LV, STE
   • Cardiology, Electrophysiology
   • https://doi.org…ard.2009.01.372
   • https://journal…eart.00549.2020
   • https://doi.org…cho.2013.04.018

2. sphericity diameter index(English)

   • maximal short axis LV diameter divided by the apex-to-base length
   • LV, SVI
   • Cardiology
   • https://doi.org…jnl-2016-310052

3. Shannon diversity index(English)

   • dbRDA, RDA
   • Statistics, Biology
   • https://doi.org…1744-7917.12966

4. standard-diameter implant(English)

   • FFB
   • Prosthetics, Dentistry
   • https://doi.org…oms.2008.06.099

5. Short Depression Inventory(English)

   • depression is often difficult to detect in long-term care patients with major neurocognitive disorders
   • LTC, CSDD, MNCD, NH-SDI
   • Depression, Cognitive function, Gerontology/Geriatrics
   • https://doi.org….1159/000533357

6. software-defined imaging(English)

   • where image sensor behavior can be altered by the system software depending on the user's needs
   • API, AR, CCD, CMOS, FIFO, NPU, SDR, TPU, VR
   • Computing (biomedical), Medical imaging
   • https://doi.org…OC.2023.3266736